Riveting gun



L. C. HUCK RIVETING GUN Sept. 3, 1946;

Filed July 31, 194/ 2 sheets-'sheet 1 L. c. HuczK RIVETING GUN Sept. 3, 1946.

Filed Ju1y 31,` 1944 2 4she@'cs-Smeet 2 www WN buh., v

IN V EN TOR.

u ,l Y4 im in contact with the surface of bore 32. At the right end of the jaws, a jaw follower 40 is provided and this is pressed against the ends of the jaws by a coil spring 4| which encircles a smaller end portion 42 of the member 34 and urges the jaws towards the left end of the member 38 so as to contract them in a radial direction. The jaws, jaw follower. and spring may substantially correspond to similar parts such as shown in Huck Patent No. 2,053,717, and the inner surfaces of the jaws may have circumferentially extending grooves for engaging a similarly grooved end on the rivet pin.

Generally, setting of the rivet would occur in substantially the same manner as setforth in the patent mentioned, and it seems only necessary to mention the procedure briefly here. The rivet is inserted in the work to be riveted and the barrel of the mechanism is moved over the rivet pin so that the pinextends through the anvil and between the jaws, As the pin enters the jaws, it may spread them slightl-yand at the same time move them slightly rearwardly against the action of the spring so that finally when the pin is in position the spring moves the jaws into gripping relation with the pin.- Instead of this procedure, the rivet may first be applied to the mechanism by moving the rivet `pin inwardly between the jaws and then moving the mechanism to place the rivet in the work. When the member 34 thereafter is pulled the jaws are rst caused to forcefully grip the pin and then the pin is pulled or moved with the member. During this action the reaction to the pull is applied through the anvil 21 to the head on the tubular member. After the rivet is set, an increase in tension on the pin breaks it andthe broken part moves on rearwardly through the member 34.

At its right end the reciprocatory -member 34 is connected to a tubular rod 45 which is threaded thereinto, and this rod, within the casing proper, has a generally rectangular portion 46 provided with rack teeth 41 on one side. At that side of the portion 46 opposite the rack teeth 41, roller bearings 48 are provided, and these are disposed in openings formed in a retaining plate 49. A bearing plate 50 supports the rollers at that side opposite the rack portion 46, and this plate is secured by screws 5| and 52 to a thickened portion A53 of the casing wall. As best shown by Fig. 3, the bearing retainer plate 49 has upwardly projecting guide flanges 56 and 51 straddling the rack portion v46 at its lower side, and the openings in the plate for the rollers 48 open only to the left side. With the rollers located in the openings vand the parts in place, removal of the rollers is prevented by a flange 58 on the bearing plate 5U.

Directing attention again to Fig. 1, the member 45 at the right end of the rack portion 416 is connected to a rod 69 which may be threaded into the end of the rack portion as indicated at 6|. This rod has a collar 62 abutting the end of the rack portion and which also serves as an abutment for one end of a coil spring 63 disposed on the rod. The rod includes a smaller portion 64 projecting through the opening |2 in the casing wall, and the spring 63 encircles this smaller portion and abuts a spring seat 65 located against the wall of the casing.

Movement of the roller retaining plate 49 is limited at one end by a rivet pin 66 projecting upwardly from the bearing plate 59, and movement in the opposite direction is limited by the collar B2 on the rod'. 'Ihese two limiting means 4 insure that the rollers will at all times be in a position opposite the rack so as to take side loads imparted against the rack.

For moving the rack portion 46 so as to pull the rivet pin, a pinion 10 engages the rack teeth, and this pinion is keyed to a shaft 'H which is journaled in bearings 112 and 13 in opposite side walls of the casing as seen in Fig. 2. A large gear 14 is also keyed to the shaft 1|, and this gear meshes with a small pinion 15 which is keyed to a shaft 16 journaled in bearings 11 and tubular projection 99 adjacent the handwheel- 18 in the casing side walls as also shown by Fig, 2. A second large gear 80, keyed to the shaft 16, meshes with a pinion 8| which is secured to a hand-wheel shaft 82 journaled in a tubular projection^83 forming part of the casing.

For turning the shaft 82 a handwheel 84 is provided on its outer end outside the casing, and while the handwheel is not keyed to the shaft, it is normally retained thereon against removal by a washer 85 and a screw or the like 86. A spring 81 inwardly of the washer 85 normally urges the handwheel 84 inwardly, but it is apparent that the wheel may be manually pulled outwardly against thevaction of the spring. Ay bearing bushing supports the handwheel on the shaft, and this bushing has a flange 9| at the inner side of the wheel which is secured to the latter by rivets 92. This flange, as best seen by Fig. 3, has circumferentially spaced ratchet teeth 93, and these are engageable with similar ratchet teeth 94 formed on a collar 95, best shown by Fig. 2, which is secured to the shaft 82 by a pin 96. It should now be evident that the ratchet teeth are urged into engaging relation by the spring 81, but that the Wheel may be reversely turned so that the teeth 93 ride idly over the teeth 94. Accordingly, the handwheel may be turned continually in one direction, or it may be turned by back-and-forth movements so as to drive the shaft by increments.

In order to prevent reverse movement of the rivet pin pulling means and hence reverse turning of the pinions and gears by the spring 63, a releasable locking device is provided adjacent the handwheel 84, and this operates to hold the shaft 82 against reverse movement. This locking means comprises a plunger 91 slidable in a 84, and this plunger is normally urged inwardly towards the collar 95 by a spring 99. At its inner end the plunger has a suitable tooth or dog portion |90 engageable with circumferentially spaced teeth IDI on the collar. The 'teeth are of such character that reverse movement of the shaft 82 is prevented while permitting forward movement of the shaft as required during setting of the rivet, but at any time, however, the plunger 91 may be pulled outwardly so as to free the shaft 82 for reverse movement.

In operating the mechanism described, the nose of the gun is pushed'over the projecting rivet pin until the latter is disposed between the jaws,

. and the anvil engages the head on the tubular rivet member. Then the handwheel 84 is turned,

and usually it will be found easier to turn the.

the gears and pinions to turn and the rack tof.

move so that the rivet pin is pulled.. After the pin is pulled suiciently to set the rivet, con-I tinued turning will break the pin and the brokenoff part will move rearwardly through the mem-4 ber 54, rack portion 46, etc.. Then Athe opera- 75 tor, by pulling the plunger 91' outwardly; can

t annona-4e release fthe turnable parts for reverse movement,

to their 4original positions. l :Y

. "While only one form of the invention fhaszbe'en illustrated vand desoribeclin detail, it `will tbe :apparent to tl'iose skilled in the art tlfiat*various :modifications may.` be `tmade fw'ithout :departing fromzthe scopeof the appendedclaims.

'1. A.mechanismv for=rela"tively moving a `tn- .bul'ar element land apinwelement extending through `it, .lcornpris'ing a casing, an anvil on the casing for applying reaction forces to the tubular element, means engageable with the pin for pulling it, a rack connected to said means, a pinion engaging the rack, resilient means opposing rivet pulling movement of the rack, handoperated means for turning the pinion and releasable means for normally preventing reverse turning of the pinion.

2. A mechanism for relatively moving a tubular element and a pin element extending through it, comprising a casing, an anvil on the casing for applying reaction forces to the tubular element, means engageable with the pin for pulling it, a rack connected to said means, a pinion engaging the rack, resilient means opposing rivet pulling movement of the rack, means for turning the pinion including a handwheel externally of the casing, and releasable means for normally preventing reverse turning of the pinion.

3. A mechanism for relatively moving a tubular element and a pin element extending through it, comprising a casing, an anvil on the casing for applying reaction forces to the tubular element, means engageable with the pin for pulling it, a rack connected to said means, a pinion engaging the rack, resilient means opposing rivet pulling movement of the rack, means for turn-` ing the pinion including a shaft and a handwheel externally of the casing, and means connectingV the wheel to the shaft so that the wheel can be reversely turned independently of the shaft.

Ll. A mechanism for relatively moving a tubular element and a pin element extending through it, comprising a casing, an anvil on the casing for applying reaction forces to the tubular element, means engageable with the pin for pulling it, a rack connected to said means, a pinion engaging the rack, resilient means opposing rivet pulling movement of the rack, means for turning the pinion including a shaft and a handwheel externally of the casing, means connecting the wheel to the shaft so that the wheel can be turned in one direction to drive the shaft and reversely turned independently of the shaft, and releasable means for preventing reverse movement of the shaft except upon release thereof.

5. A riveting mechanism for setting a two-part rivet where one part is pulled and the reaction to the pull is applied against the other part, comprising a casing, a reciprocatory member projecting from the casing, means on the member for engaging the one rivet part so as to pull it, means on the casing for applying the reaction force to the other rivet part, means including a turnable shaft for moving the member, a manually turnable element on the shaft, and means connecting the element to the shaft so that the latter may be turned in the rivet pulling direction by increments through back and forth turning of the element.

6. A riveting mechanism for setting a two-part rivet where one part is pulled and the reaction to the pull is applied against the other part, comprising a casing, a reciprocatory member projectingrfrom the casingmeans .on theimember tor Len- 'gagirig the one rivet part .sor as" to 'ipull ift,` means on the casing for applying the reaction `force to the other rivet part,` means .including a turnable shaft lfor moving the member, a .manually turnable elementtpn the shaft, `means .connecting the element to the Ashaft vso that the latter' may be turned `in the-irrivet pulling .direction by 'increments tol .setx.the rivetthrougnback and forth turn-ingA ofi element, lan-d releas ableV means ien thecasin'g forfpreven'ting reverse turningfof the shaftduring setttingofthe rivet. i

'7. A riveting mechanism for setting a two-part rivet wherein one part is pulled and the reaction ito the pull is applied against the other part, comprising a casing, a reciprocatory member projecting from the casing, means on the member for engaging the one rivet part so as to pull it, means on the casing for applying the reaction force to the other rivet part, means for moving the reciprocatory member including rack teeth on a portion thereof in the casing, a reduction gear train in the casing and including a pinion meshing with the rack teeth, means for driving the reduction gear train including a yshaft projecting to the exterior of .the casing, a manually turnable element on the shaft, means connecting the element to the shaft so that the latter may be turned in the rivet pulling direction iby increments so as to enable driving the reduction gear train and setting the rivet through back and forth turning of the element, and releasable means on the casing for preventing reverse turning of the shaft during setting of the rivet.

8. A riveting mechanism for setting a two-part rivet wherein one part is pulled and the reaction to the pull is applied against the other part, comprising a casing, a reciprocatory member projecting from the casing, means on the member for engaging the one rivet part so as to pull it, means on the casing for applying the reaction force to the other rivet part, means for moving the reciprocatory member including rack teeth on a portion thereof in the casing, a reduction gear train in the casing and including a pinion meshing with the rack teeth, means for driving the reduction gear train including a shaft projecting to the exterior of the casing, a manually turnable element on the shaft, means connecting the element to the shaft so that the latter may be turned in the rivet pulling direction by increments so as to enable driving the reduction gear train and setting the rivet through back and forth turning of the element, releasable Vmeans on the casing for preventing reverse turning of the shaft during setting of the rivet, and Ispring means opposing movement of the reciprocatory member in its rivet setting direction, whereby when the rivet has been set, the releasable means may be released so as to allow the spring to effect reverse rotation of the reduction gear train and return all the parts to their initial positions.

9. A riveting mechanism for setting a two-part rivet where one part is pulled and the reaction to the pull is applied against the other part, comprising a casing, a reciprocatory member slidable in the casing, means on the member for engaging the one rivet part so as to pull it, means on the casing for applying the reaction force to the other rivet part, means including a turnable shaft for moving the member, a manually turnable element on the shaft, means connecting the element to the shaft so that the latter may be turned by said manually turnable element so as to pull said one rivet part, and releasable means on the casing for preventing reverse turning of the shaft during the pulling of said one rivet part and setting of the rivet.

10. A mechanism for moving a tubular element and a pin element extending through it, comprising a casing, an anvil on the casing for applying the reaction force to the tubular element, means engageable with the pin for pulling it, a rack connected to said means, a pinion engaging the rack, resilient means opposing the rivet pulling movement of the rack, means for turning the pinion including a shaft and a manuallyiengageable elev8 ment on the shaft located externally of the casing, means connecting the manually engageable element to the shaft so that upon turning itin one direction it drives the shaft to cause the pin element to be pulled and the reaction force to be applied against the tubular element, and releasable means for preventing reverse movement of the shaft except upon release thereof so that during setting of the rivet the shaft will not turn reversely even though the manually turnable element is not manually held against reverse turning.

LOUIS C. HUCK. 

